Raman and resonance Raman spectroscopy of iodoplatinate(II), iodoplatinate(IV) and mixed-valence iodoplatinate(II,IV) salts

• Published in: Inorganica Chimica Acta Vol. 191; no. 1; pp. 121 - 129
• Main Authors: Baechle, W., Rotter, H.W., Thiele, G., Clark, R.J.H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 03.01.1992; Elsevier Science
• Subjects: Atomic and molecular physics; Exact sciences and technology; Molecular properties and interactions with photons; Molecular spectra; Physics; Raman and rayleigh spectra (including optical scattering); Mixed oxidation number; Platinum Complexes; Resonance Raman scattering; Molecular structure; Anionic complex; Transition metal Complexes; Experimental study; Inorganic compound; Quaternary ammonium compound; Platinoid Complexes; Iodo complex; Vibrational mode; Raman spectrum
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/S0020-1693(00)80338-2

The Raman and resonance Raman spectra of a number of new iodoplatinate(II), iodoplatinate(IV) and mixed valence iodoplatinate(II,IV) salts are presented. Previous X-ray structure determination showed that the building blocks of all these compounds consist of PtI 6 octahedra and/or PtI 4 squares, which can be isolated or connected to dimeric units or polymeric chains. The Raman spectra show that the different coordination polyhedra and oxidation states of the platinum atoms have only a small influence on the wavenumbers of bands attributable to the Pt-I stretching modes. Due to the presence of intervalence transitions in the region probed the mixed-valence compounds show stronger resonance effects then the single-valence parent compounds. The resonance Raman spectra are determined not only by A-term activity but also by B-term activity.